My rig came factory with the 6.2 diesel in it and was converted to a 305 before I bought it. the wires coming from the sending unit are cut at the engine side of the firewall. there are two wires, looks like a pink and an orange but they could be faded. I need help in finding where they connect on the inside of the cab. I am assuming one gets power when you turn the key on and the other sends a resistance to the gas guage to move the needle in conjunction with the sending unit, but i dont know which does what. Does anyone know or have schematic to help me out. Thanks in advance and sorry so long.